docs: def delete(self, *names):
          '''
          Deletes the object with "name" from the session, if exists.
          '''
  
          def change(session):
              keys = session.keys()
              names_in_common = [name for name in names if name in keys]
              for name in names_in_common:
                  del session[name]
          self.__change_session(change)